Celestron C90 Mak Spotting Scope - 52268

The Celestron Spotting Scope Maksutov optical design is recognized for being a portable design that is easy to use and has a variety of applications, making it an excellent choice for both terrestrial and astronomical usage. This Celestron C90 Mak Spotting Scope has excellent optics with razor sharp images over a wide field.

• Multi Coated Optics

   

   

• Maksutov-Cassegrain Optical Design

   

   

• Compact and Portable Design

   

   

• Erect Image System for Terrestrial and Astronomical Use

   

   

• Built-in T-Adapter threads for Ease of Adapting SLR Cameras

   

   

• Comes with 32 mm Eyepiece, 45 Degree Erect Image

  Diagonal and 8x21 Erect Image Finderscope

   

   

• Backpack Made of Nylon

   

   

• Limited Lifetime Warranty

"The C90 Mak is a fantastic grab-n-go scope for astronomy. The scope comes with a factory installed vixen style mount for astro mounts, but is also tapped for use with a photo tripod providing the ultimate in flexibility. The unit provides tack sharp images and is great for lunar and planetary viewing. For astro use, I replaced the 45 degree prism with a 90 degree optional star diagonal to maximize performance. The scope is so light that when mounted to my photo tripod and video head, I can carry the whole set up outside in one trip. 90mm aperture provides enough light gathering for planetary and lunar viewing while keeping cool down time to a minimum." 

Optical Design: Maksutov-Cassegrain

Aperture (mm): 90 mm (3.54 in)

Focal Length (mm): 1250 mm (49 in)

Focal Ratio: 14

Angle: 0 or 45 degrees

Eyepiece 1 (mm): 32 mm (1.26 in)

Magnification 1: 39 x

Finderscope: 8x21

Carrying Case: Backpack made of nylon

Highest Useful Magnification: 213 x

Lowest Useful Magnification: 13 x

Limiting Stellar Magnitude: 12.3

Resolution (Rayleigh): 1.55 arc seconds

Resolution (Dawes): 1.29 arc seconds

Light Gathering Power (Compared to human eye): 165 x

Angular Field of View (deg): 1.3 degrees

Linear Field of View (@1000 yds): 68 ft (21 m)

Linear Field of View (@1000 m): 23 m (75 ft)

Eye Relief (mm): 20 mm (0.79 in)

Near Focus (Binoculars): 15 ft (4.57 m)

Optical Coatings: Multi-Coated

Optical Tube Length: 16 in (406 mm)

Weight (lbs): 5 lbs (2.27 kg)

Camera Adaptable: Optional T-Adapter

Tripod Adaptable: Yes